전동기에 의한 차륜의 구동/제동 상태의 전환시에 있어서의 차륜의 초과 슬립의 오판정을 회피하여, 판정 정밀도를 향상시킬 수 있는 차량의 슬립 판정 장치를 제공한다. 본 발명에 의한 슬립 판정 장치에서는, 후륜(WRL, WRR)을 제구동하는 리어 모터(41, 61)의 회전수인 제1 및 제2 모터 회전수(NMOT1, NMOT2)가, 차륜 회전수(NWFL, NWFR, NWRL, NWRR)에 기초하여 설정된 기준 회전수(NMREF)에 도달했을 때에, 후륜(WRL, WRR)에 초과 슬립이 발생했다고 판정한다. 리어 모터(41, 61)의 목표 토크(TROBJ)의 부호가 반전될 때에는, 기준 회전수(NMREF)를, 제1 및 제2 모터 회전수(NMOT1, NMOT2)가 보다 도달하기 어려운 값으로 변경하거나, 또는 초과 슬립의 판정을 금지한다.
A slip determination system for a vehicle, which is capable of improving the determination accuracy by avoiding erroneous determination of excessive slip of wheels when a state of the wheels, driven/braked by motors, is switched. In the slip determination system according to the present invention, when first and second motor rotational speeds NMOT1 and NMOT2, which are rotational speeds of rear motors 41 and 61 which brake/drive rear wheels WRL and WRR, reach a reference rotational speed NMREF set based on wheel rotational speeds NWFL, NWFR, NWRL, and NWRR, it is determined that excessive slip has occurred in the rear wheels WRL and WRR ( FIG. 9 ). When the sign of a target torque TROBJ of the rear motors 41 and 61 is inverted, the reference rotational speed NMREF is changed to a value more difficult to be reached by the first and second motor rotational speeds NMOT1 and NMOT2 (steps 28 and 29 in FIG. 8 ), or the excessive slip determination is inhibited (step 51 in FIG. 12 ).
SLIP DETERMINATION SYSTEM FOR VEHICLE
차량의 슬립 판정 장치
2019-01-25
Patent
Electronic Resource
Korean
IPC: | B60K Anordnung oder Einbau von Antriebseinheiten oder von Kraft- bzw. Drehmomentübertragungen in Fahrzeugen , ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES / B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen / B60T Bremsanlagen für Fahrzeuge oder Teile davon , VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF / B60W CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION , Gemeinsame Steuerung oder Regelung von Fahrzeug-Unteraggregaten verschiedenen Typs oder verschiedener Funktion |